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Reaction of oxygen nucleophiles with β-alkoxyvinylphosphonium salts. Isolation of phosphine oxides.

✍ Scribed by Suzanne M. Ruder; Bradley K. Norwood

Book ID
104224628
Publisher
Elsevier Science
Year
1992
Tongue
French
Weight
193 KB
Volume
33
Category
Article
ISSN
0040-4039

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✦ Synopsis

AQstractr A variety of ~alk-oxyvinylphosphonium bromides were prepared and reacted with sodium ethoxide and dim.@ anion to generate good yields of phosphine oxides 3 rather than the previously reported ylide ?.

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Reaction of pyrylium salts with nucleoph
Reaction of pyrylium salts with nucleophiles. Part 25. Formation of pyridine-1-oxides, 2-isoxazolines and 1-pyrazoline-1-oxides
✍ Cornelia Uncuta; Miron Teodor Cǎproiu; Valentin Câmpeanu; Aurica Petride; Marian 📂 Article 📅 1998 🏛 Elsevier Science 🌐 French ⚖ 989 KB

The reaction of tri-and tetrasubstituted pyrylium salts with hydroxylamine affords acyclic keto-ketoximes (to be described in a separate paper) which cyclize yielding pyridine-l-oxides and/or 2-isoxazolines. Both these classes of compounds, with many possible applications, can thus be obtained simpl